大豆几种光周期处理效应的植物激素解析

研究了大豆光照后效应、开花逆转、光周期对源库关系的调控、摘荚后光周期反应等现象中，内源激素的变化及几种外源生长物质对大豆发育的效应。结果表明，开花前对超早熟大豆品种东农36进行短日处理，明显加快开花后发育速度，降低叶片中的ABA和ZRs含量;幼苗期(VE-V2)对晚熟品种自贡冬豆进行l0 d左右的短日处理，尔后置15 h长

Phytohormonal Analysis of Some Photoperiod Effects in Soybean

The changes of endogenous hormones in photoperiod after-effect, long day (LD) induced flowering reversion, photoperiod regulation on source-sink relation, photoperiod response of depoded plants and effects of some exogenous growth substances on soybean development were studied. Pre-flowering short day (SD, 12h) treatment promoted post-flowering development of super-early soybean variety Dongnong 36 and decreased the contents of ABA and ZRs in leaves after flowering. The seedlings of Zigongdongdou(a late variety) induced in SD from VE(emergence) to V2(second-node stage) and then transferred to long days (LD, 15h) had higher IAA and lower ABA in the leaves, compared with that in continuous LD. The ratio of hormonal contents in leaves to that in seeds was lower in SD than in LD. The increase of seed weight in SD might be related to more partitioning of hormone to seeds. When the plants were depoded, the contents of ABA and IAA in the leaves increased in SD. Applications of GA3 in SD, PP333, S3307 and ABA in LD didn't greatly influence for the development of soybean. The chemical control of soybean development was discussed.